The brutal murders of Robin Kaye, a music supervisor on "American Idol," and her husband, musician Thomas DeLuca, at their home in Encino earlier this week sent shockwaves through Los Angeles ... and we've learned the suspect,

"American Idol" music supervisor Robin Kaye, who was shot dead, worked on other competition shows including "Lip Sync Battle" and "The Singing Bee."

A 22-year-old Los Angeles man is facing murder and burglary charges for the killing of a longtime American Idol staffer and her husband while allegedly attempting to rob their home in an upscale Los Angeles neighborhood last week.